Sorry for the inevitable noob post...
I have recently come to suspect that my DP has been tampered with(de-catted).
Short of dropping the dp and looking, is there an easier way to tell if one of the cats has been removed?

bigjweb

10-09-2012 05:51 PM

usually a catless car will smell differently then a catted

Haight 05LGT

10-09-2012 06:52 PM

Quote:

Originally Posted by bigjweb
(Post 4107698)

usually a catless car will smell differently then a catted

I do notice a smell at WOT. Almost smells like my car is running rich.

Haight 05LGT

10-09-2012 08:30 PM

Besides the smell, are there any other signs?

xero287

10-10-2012 09:08 AM

Your tune from Infamous should be different. He should have mentioned something about it.

bigjweb

10-10-2012 09:19 AM

That's assuming that infamous cares enough to notice the difference and actually make an effort to say something about it. They prob just tune as quickly as possible, so I doubt they scrutinize data that closely over there. Very assembly line

TheOneDoubleN

10-10-2012 10:10 AM

Quote:

Originally Posted by bigjweb
(Post 4108528)

That's assuming that infamous cares enough to notice the difference and actually make an effort to say something about it. They prob just tune as quickly as possible, so I doubt they scrutinize data that closely over there. Very assembly line

How do you have an assembly line with two guys working out of a small shop in Escondido? :lol:

Haight 05LGT

10-10-2012 10:19 AM

Quote:

Originally Posted by xero287
(Post 4108507)

Your tune from Infamous should be different. He should have mentioned something about it.

My tune was OTS. He didnt know about the DP. I still dont know 100% if it is catless.....looks like I will just have to drop it an look.

Maybe it's just me, but reading your OP makes me think that you could be talking about two different scenarios of a de-catted DP. Either it's completely catless or has been gutted.

Catless DP, the DP was either built without a Cat or the Cat was cut out and replaced with same length of pipe. It should be fairly easy to look at the pipe from the engine bay and underneath to visually see if there is a bulged area (this is where the cat would be). If there is no bulge in the DP to the mid pipe chances are you have a catless DP.

Gutted DP, the catalytic materials were removed and the shell of the catalytic converter remains in tact on the DP. If your DP has a cat and you need to find out if it's been gutted... the only way to know for sure is to pull the DP off.

DocHolladay23

10-10-2012 10:35 AM

Simple test, put an open can of tuna near the tail pipe, if no cat comes out then it has been removed.

Haight 05LGT

10-10-2012 10:37 AM

Quote:

Originally Posted by peterjmc
(Post 4108679)

Maybe it's just me, but reading your OP makes me think that you could be talking about two different scenarios of a de-catted DP. Either it's completely catless or has been gutted.

Catless DP, the DP was either built without a Cat or the Cat was cut out and replaced with same length of pipe. It should be fairly easy to look at the pipe from the engine bay and underneath to visually see if there is a bulged area (this is where the cat would be). If there is no bulge in the DP to the mid pipe chances are you have a catless DP.

Gutted DP, the catalytic materials were removed and the shell of the catalytic converter remains in tact on the DP. If your DP has a cat and you need to find out if it's been gutted... the only way to know for sure is to pull the DP off.

My DP is oem so I am thinking it is gutted..

Quote:

Originally Posted by DocHolladay23
(Post 4108684)

Simple test, put an open can of tuna near the tail pipe, if no cat comes out then it has been removed.

Always with the witty remarks. Good one.

Haight 05LGT

10-11-2012 10:40 AM

I really dont want to drop this thing....not even sure I have the proper tools.

TheOneDoubleN

10-11-2012 10:42 AM

Well seeing how that is the only way to know when you're talking about a gutted stock DP, it sounds like your solution is to have someone else pull it and check.

PeterJMC

10-11-2012 10:47 AM

Quote:

Originally Posted by Haight 05LGT
(Post 4110270)

I really dont want to drop this thing....not even sure I have the proper tools.

Why do you need to know if it's been gutted or not? If you are just in it to be curious it's not worth it. If it's affecting your vehicles performance, would probably be worth the effort.

Haight 05LGT

10-11-2012 10:51 AM

Quote:

Originally Posted by peterjmc
(Post 4110283)

Why do you need to know if it's been gutted or not? If you are just in it to be curious it's not worth it. If it's affecting your vehicles performance, would probably be worth the effort.